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In Paolo Aluffi's proof of the Jordan-Holder Theorem he uses a symbol indicating a subset of a group ... BUT ... not equal to the group ... as in the following, between say $$G_0$$ and $$G_1$$ ...
View attachment 4913Can someone help with the Latex code for the symbol ... ...
Peter
View attachment 4913Can someone help with the Latex code for the symbol ... ...
Peter